Explain how Corpuscular theory predicts the speed of light in a medium, say, water, to be greater than the speed of light in vacuum. Is the prediction confirmed by experimental determination of the speed of light in water ? If not, which alternative picture of light is consistent with experiment?
A: In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. R: In the photon picture of light, for a given frequency, intensity of light is determined by the numberof photons per unit area.
(a) Compare the speed of light of wavelength 4000 Å (i.e., violet light) and 8000 Å (i.e. red light) in vacuum. (b) How is the refractive index of a medium related to the speed of light in it and in vacuum or air ?
The amount of light produced by a cylindrical fluorescent light bulb depends on its lateral area. A certain cylindrical fluorescent light bulb is 36 inches long, has a 1 inch diameter, and is manufactured to produce 0.283 wants of light per square inch. What is the best estimate for the total amount of light that it is able to produce?
Orange light of wavelength 6600 Å travelling in air gets refracted in water. If the speed of light in air is 3xx10^(8)ms^(-1) and refractive index of water is 4/3, find : (i) the frequency of light in air, (ii) the speed of light in water, and (iii) the wavelength of light in water.
